Cast fitting typically used to create a "brace" in between a frame or grid for added stability.
Hollaender Fitting 1-1/4" Cross
Hollaender Fitting 1-1/4" Short Barrel Cross
Hollaender Fitting 1-1/4" Split Cross
Hollaender Fitting 1-1/4" Elbow
Hollaender Fitting 1-1/4" Modified Cross